diff --git a/theia-swift-docker/Dockerfile b/theia-swift-docker/Dockerfile
index ab385d00..ce2b3d98 100644
--- a/theia-swift-docker/Dockerfile
+++ b/theia-swift-docker/Dockerfile
@@ -4,7 +4,7 @@ RUN npm install -g vsce
 RUN git clone --depth 1 https://github.com/apple/sourcekit-lsp
 WORKDIR /sourcekit-lsp/Editors/vscode
 RUN npm install
-RUN npm run postinstall
+RUN npm run vscode:prepublish
 RUN vsce package -o ./sourcekit-lsp.vsix